Ngoc Huyen, Dang, Phung Thi Tuyen, Vu Thi Loan, and Le Xuan Dac. “THE CONTENTS OF 20-HYDROXYECDYSONE (20E), QUERCETIN AND ESSENTIAL OILS IN ASTERACEAE SPECIES GROWING IN TAM DAO DISTRICT, VINH PHUC PROVINCE, VIETNAM”. Journal of Forestry Science and Technology, no. 7 (May 15, 2019): 072–081. Accessed January 18, 2025. https://journal.vnuf.edu.vn/en/article/view/785.